Siemens MOBILETT Plus Service Instructions Manual page 54

6 - 10
Exposure values: 133 kV 5 mAs, HTPOS & HTNEG 2 V/div,
20 kV/div; 100 µs/div (only the end of the exposure is shown)
HTPOS on
D1
HTNEG on
D1
Fig. 7 HT-signal, high speed HTNEG discharges (Defective tube, filament transformer, wires to the cathode).
MOBILETT Plus/ Plus E
HT and single tank error diagnosis
SPR8-215.898.02
Rev. 01 01.02
Page 10 of 12 Siemens-Elema AB
SPS-UD Solna, Sweden